consuming .net web services in delphi

[phaniva]

I have to consume asp.net web services in Delphi client.
For each web method the service has defined a soap header.
I was able to pass header information to the service using
THTTPRIO.SOAPHeaders.Send method. The service also sends a SOAP Header back. I am unable to retrieve the header information from the response.

Below is my code and soap messages from server.
h := MyMessageHeader.Create;
h.UserName := 'test';
h.Password := 'test';
R := THTTPRIO.Create(nil);
R.URL := '

http://someserver/somepage.asmx';

s := (R as MyWebService);
Headers := s as ISOAPHeaders;
Headers.Send(h); {set the header here to be sent to server }
resp := s.MyWebMethod(req);
(s as ISOAPHeaders).Get(SedcMessageHeader, TSOAPHeader(h));
{After this statement the header object does not have the information sent by server}

Here is xml request sent to server
<SOAP-ENV:Envelope xmlns:SOAP-ENV="

http://schemas.xmlsoap.org/soap/envelope/"

xmlns:xsd="

http://www.w3.org/2001/XMLSchema"

xmlns:xsi="

http://www.w3.org/2001/XMLSchema-instance"><SOAP-ENV:Header><MyMessageHeader

xmlns="

http://MyService.DataTypes/2007/05"

ObjectsRemaining="0" UserName="test" Password="test"/></SOAP-ENV:Header><SOAP-ENV:Body><MyWebMethodRequest xmlns="

http://MyService.ServiceContracts/2007/05"/></SOAP-ENV:Body></SOAP-ENV:Envelope>

Here is the response from server
<soap:Envelope xmlns:soap="

http://schemas.xmlsoap.org/soap/envelope/"

xmlns:xsi="

http://www.w3.org/2001/XMLSchema-instance"

xmlns:xsd="

http://www.w3.org/2001/XMLSchema"><soap:Header><MyMessageHeader

ObjectsRemaining="656" UserName="test" Password="test" SessionId="C:\WINNT\TEMP\ATP_061912201387.txt~286500" xmlns="

http://MyService.DataTypes/2007/05"

/></soap:Header><soap:Body><MyWebMethodResponse xmlns="

http://MyService.ServiceContracts/2007/05">

...

Why cannot I retrieve the header information sent by server? Is there anything special I have to do.

thanks for the help